Question about Lochinvar WBN210 Knight 210,000 BTU Stainless Steel Boiler

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Domestic hot water check pounds when heating loop pump shuts off

When the heating pump stops, the domestic hot water chech pounds

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Check the water pressure.

Posted on Aug 03, 2014

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2 Answers

My boler will heat the hot water & heating but not the hot water on its own


This is possibly because you have a zone valve that has stopped working, motor maybe burnt out or could be that it is permanently open . Some valves have a manual control that clicks into position, these valves are usually placed adjacent to your hot water cylinder
Hope this helps

Jun 22, 2015 | Heating & Cooling

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How do I fix central heating


The first thing you need to substantiate is the fact that there is enough water in the system. It will be a closed loop system requiring approximately 10 psi/ floor. (Only a rule of thumb). Usually when one protion of the system works and the other does not, it is an issue of water quantity available to circulate through the combination of loops. If you have to add water, you will probably have to purge air from the highest points in the system. Even if there is an "Airtrol" fitted in the bottom of the expansion tank, bleeding the high points will eliminate air quicker.

The hot water portion of the loop should only be going through a heat exchanger that transfers the loop temp to the domestic water circuit and the three way valve is probably a 'mixing valve' utilized to maintain a certain loop temperature on the primary loop.

Dec 01, 2014 | Honeywell Heating & Cooling

1 Answer

Does the boiler thermostat control the heat of the radiators as well as the hot water temperature? Does the thermostat control the water temperature and the pump - as our pump seems to be on all the...


There should be a control called an aquastat that regulates the temperature of the boiler. The thermostat will turn on the circulator to start the flow of water through the radiators. If the water coming back from the radiators is very cold, a control will shut off the circulator until the boiler can come up to a predetermined temperature then start the flow of water again. If you have a tankless coil for domestic hot water, you now have a triple aquastat that maintains the temperature for domestic as well as the boiler temp. So yes the boiler thermostat (aquastat) does control the heat of the radiators and domestic hot water. No the pump is regulated by your house thermostat. You should take an amp draw on the boiler and componants to find out what is drawing more electricity than it should and popping your fuse.

Feb 19, 2011 | Heating & Cooling

1 Answer

My furnace which is run by oil and is water baseboard is not producing heat to 2 of the 4 zones in my house. I checked the zone valve and that is working okay. I do not believe the pipes are frozen,...


Let's see if we can do some trouble shooting steps:

First-- what temperature is the boiler keeping the water at?
and the circulator pump is running like it should, right?

As the pump runs, do you hear any gurgling sounds?
This indicates possible air int he system---
Have you tried eliminating air from the 2 runs that are cold?
Water can NOT circulate, if a bubble of air traps off the loop--
The water flow stops, even tho the other loops are flowing fine.
There should be an air bleed screw at the high point of each of these loops
(Like possibly-- at the high end of the radiator?-- Often a screw driver slotted screw-- WHen you open it, air and water will come out, until just water--- Then do the other loop-- and come back to the first, -- repeat until yo get NO AIR out of the loop.
You should feel hot water start flowing right away.

Let us know if this helps-- if not we go tothe next steps!

Let us know further,

Mack B

Jan 17, 2011 | Heating & Cooling

1 Answer

I need a diagram for an indirect hot water system heated by a solid fuel boiler and an oil boiler


If you are using more than one heat source you will have 1 more pump than the heat source pumps Main pump = SYSTEM pump pumps through the indirect hot water system and back into itself. This is the system loop. The other two boilers tee into this loop upstream of the indirect tank, downstream of the SYSTEM pump. The cold water return to each boiler tees into the system loop next to and upstream of where the hot water for that boiler tees into the system the loop. The oil boiler will have its own pump on its return line from the sytem loop and the solid fuel boiler will have its own pump. When any boiler fires, it turns on its own pump AND the system pump. If you want a drawing email me -pipesster@gmail.com send a fax number and I'll fax you a drawing.

Jan 15, 2010 | Aquapure AP431 Hot Water System Cartridge

1 Answer

I can.t get any heating


if you dont have hot air or hot water then it sounds like you have a hot water coil in you fan unit. The water heater heats both your domestic water and a closed loop for your home heating you may want to make sure the pilot is lit on the water heater. if you cant get the pilot lit by following the insrutions on the water heater you will need to call a heating contractor

Sep 21, 2009 | Heating & Cooling

1 Answer

Combi bioler heats water but wont heat the


There are 2 Heat Exchangers and 2 Water Pumps on a Combi, at least the one I had when I lived in the UK did.
There is a Thermal Cut Out on both. They look like a Disc, that is Soldered [with provision for connecting the wiring] onto the Hot Water Outlet from the Exchanger to the Pump, to Supply either the Domestic Hot Water, or on the other Exchanger, Central Heating.
If 1 of these fails, the System will start up and when the temp reaches a certain point will trip out the Burner, and continue to Run the Pump until the Temperature drops, and then Stop.
The type I had, had Pumps with a Black front facind nut, this unscrews anti clockwise to release that center, that could be pulled slightly, and used as a Key to turn the Pump Impeller, in the event that lack of use would make it stick, when powered up.
There shouId be a Diagram, inside of the Front Panel, that shows the layout for the whole Internal Water flow, Pipes, Pumps, Safety devices etc. I hope this has helped you.
Regards,DT
Nevada, USA

Aug 29, 2009 | Heating & Cooling

1 Answer

Central heating and hot water have suddenly stopped working


not an engineer but maybe a heating compant,, it sounds like you have a relay that has gone bad, you have what we call a winter summer system your domestic water comes from a tank inside the boiler, you might want to think about splitting the system to save you some money in the long run, seperate the water heater from the boiler so you only heat up in the winter, right now you are heating the system that heats your house to get 30 or 40 gals of domestic hot water, it would cost you less by seperating them

May 17, 2009 | Water Heaters

1 Answer

Vaillant Ecotec combi boiler - radiators working but no hot water flow to taps


David,

The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.

What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.

A good place to start might be the flow switch (usually in the bottom of the boiler, where the cold water supply comes in) or the electrical connections to it.

A.

Oct 05, 2008 | Heating & Cooling

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Pool and Spa Heaters pros and cons


An electric heat pump needs heat available to pump. If it is 30 degrees outside, heating a spa to 102 or so, may be impossible unless the heater has some type of alternative heat source. A properly sized, gas fired heater can take care of a larger range of heating needs. A combination heat pump and natural gas heater, probably with a controller, really makes the issue more difficult, expensive, and would require a lot of study for efficient, cost effective operation. Bottom line: In really mild climates a heat pump might do the job. In cooler climates the gas heater rules. And where a wide range of temperatures and high heat demand is wanted by the customer, a gas heater is the only way to go. A backup heat pump may take years to payout.

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